Cant you just buy VT?
0.05% expense ratio and it gives you international and US exposure, it easily beats any mutual fund after fees. Buying and remaining 100% invested in VT is the optimal solution for your entire lifetime according to modern research, its cheap and easily beats having bond exposure. Bonds are for chicken littles who hurt themselves in their confusion, they never out-compete stocks when you have a multi-decade retirement.
If you're interested in the research, all the papers are cited in the description:
https://www.youtube.com/watch?v=1FXuMs6YRCY